package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {

	public static void main(String[] args) throws IOException {
		
		if (args.length < 3){
			System.out.println("Please specify parameters: <amount of test data> <file> <format>");
			return;
		}
		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]); 
		String format = args[3]; // 2 - xml, 3 - csv
		
		if (file.exists()){
			System.out.println("File exists, please remove it manually: " + file); 
			return;
		}
		
		List<ContactData> contacts = generateRandomContacts(amount);
		if ("csv".equals(format)){
			saveContactsToCsvFile(contacts, file);
		}
		else 
			if ("xml".equals(format)){
			saveContactsToXmlFile(contacts, file); 
		}
		else {
			System.out.println("Unknown format " + format);
			return;
		
		}
	}

	private static void saveContactsToXmlFile(List<ContactData> contacts, File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contacts", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
	}
	
	public static List<ContactData> loadGroupsFromXmlFile(File file){
		XStream xstream = new XStream();
		xstream.alias("contacts", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);
	}
	

	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException 	{
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
			.withFirstName(part[0])
			.withLastName(part[1])
			.withEmail(part[2])
			.withAddress(part[3])
			.withHomeTel(part[4])
			.withMobileTel(part[5])
			.withWorkTel(part[6])
			.withBirthdayYear(part[7]);
			list.add(contact);
			line = bufferedReader.readLine();
		}
		bufferedReader.close();
		return list;
	}


	private static void saveContactsToCsvFile(List<ContactData> contacts, File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstName() + "," 
		+ contact.getLastName() + "," 
		+ contact.getEmail() + ","
		+ contact.getAddress()  + ","
		+ contact.getHomeTel()  + ","
		+ contact.getMobileTel()  + ","
		+ contact.getWorkTel()  + ","
		+ contact.getBirthdayYear()  + ",!" + "\n");
		}
		writer.close();
		
	}

	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();
		for (int i = 0; i < amount; i++){
			 ContactData contact = new ContactData()
			 .withFirstName(generateRandomString())
			 .withLastName(generateRandomString())
			 .withAddress(generateRandomString())
			 .withHomeTel(generateRandomString())
			 .withMobileTel(generateRandomString())
			 .withWorkTel(generateRandomString())
			 .withEmail(generateRandomEmail())
			 .withEmail2(generateRandomEmail())
			 .withBirthdayYear(generateRandomYear())
			 .withAddressSec(generateRandomString())
			 .withHomeSec(generateRandomString());

		    list.add(contact);
		}
		return list;
	}
	public static String generateRandomYear() {
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0){
			return "";
		}	else {
			int year = 1000 + rnd.nextInt(1014);
			return "" + year;
		}
	}
	public static String generateRandomEmail(){
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0){
			return "";
		}	else {
			return "test" + rnd.nextInt() + "@StupidFox.ru";
		}
	}

	public static String generateRandomString(){
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0){
			return "";
		}	else {
			return "test" + rnd.nextInt();
		}
	}

}

